Re: [f-cpu] CAS in FC0

[Cedric BAIL <cedric.bail@free.fr>]

> What about the scheduling ? it's almost as fast, if there are all the
> bypass networks !
> 
>   load_tag [r1],r2
>   xor  r2,r3,r4
>   if r4==0 store_locked [r1],r3

I have one question, what append when we do a normal store and the
data are not present into the cache ? Does it force a load before doing
the store. Because if it doesn't, what append when a first CPU do a CAS
operation on a data that is only writed by the second CPU (So not in cache
when the load_tag is done) and when the second CPU is the owner of the
memory.

A+
  Cedric
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